Hi guys, I am fairly new to the forum and have never posted before. This may sound a like a stupid question but I have a 2005 6.0 . Can I take the catilitic converter out of the exhaust system, I have already taken the muffler off . If I can what would be the benifits if any and the down side. Thanks

Beyond the response of what the laws are and all the environmental repercussions... You will gain some noise and lower your exhaust gas temps.
Downside is those environmental laws and impact (and depending on your personal views, the increased noise). You will fail any roadside check or state mandated emissions testing, you can also get fined pretty heavily.

There have been reports of people getting pulled over and randomly checked. I haven't heard of this happening up in this part of the country.....yet.

You should always be very careful when you remove the catalytic converter from the vehicle. Never leave it out in the garage by itself because long handled tools sometimes attack and repeatedly throw themselves into the cat and knock out all the material inside. When the tools finish they leave the cat hollowed out and it would appear to be stock. And if you didn't know any better, you would re-install a hollowed out catalytic converter and never know what happened.

I get your point with the tools, Its funny I had that happen on a gas motor years ago when I was younger and not very smart. Do you think the exhaust would be extremly loud. My son has a Dodge { yeaI know thats a bad word but ] and his did not come from the factory with one and his exhaust is realy not all that loud , but it is only a six cylinder not sure what the difference a v 8 would make.

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